internal/testprotos/conformance: make package name match dir

Change the rewritten Go package name for the conformance protos to match
the basename of the directory (i.e., "conformance").

This is a trivial change, but avoids confusion when the package name and
import path don't match.

Change-Id: I9b091c78ce4a85f7051c55ee1a48ef6dbba68db6
Reviewed-on: https://go-review.googlesource.com/c/protobuf/+/174944
Reviewed-by: Herbie Ong <herbie@google.com>
diff --git a/integration_test.go b/integration_test.go
index 575148a..9bd3024 100644
--- a/integration_test.go
+++ b/integration_test.go
@@ -302,9 +302,9 @@
 		"src/google/protobuf/wrappers.proto":             "github.com/golang/protobuf/v2/types/known;known_proto",
 		"src/google/protobuf/descriptor.proto":           "github.com/golang/protobuf/v2/types/descriptor;descriptor_proto",
 		"src/google/protobuf/compiler/plugin.proto":      "github.com/golang/protobuf/v2/types/plugin;plugin_proto",
-		"conformance/conformance.proto":                  "github.com/golang/protobuf/v2/internal/testprotos/conformance;conformance_proto",
-		"src/google/protobuf/test_messages_proto2.proto": "github.com/golang/protobuf/v2/internal/testprotos/conformance;conformance_proto",
-		"src/google/protobuf/test_messages_proto3.proto": "github.com/golang/protobuf/v2/internal/testprotos/conformance;conformance_proto",
+		"conformance/conformance.proto":                  "github.com/golang/protobuf/v2/internal/testprotos/conformance;conformance",
+		"src/google/protobuf/test_messages_proto2.proto": "github.com/golang/protobuf/v2/internal/testprotos/conformance;conformance",
+		"src/google/protobuf/test_messages_proto3.proto": "github.com/golang/protobuf/v2/internal/testprotos/conformance;conformance",
 	}
 	for pbpath, gopath := range files {
 		b, err := ioutil.ReadFile(filepath.Join(repoRoot, pbpath))